Encyclopedia Astronautica
RZ.2


Rolls Royce Lox/Kerosene rocket engine. 836.3 kN. Isp=282s. Used on Europa launch vehicle. First flight 1964.

Thrust (sl): 735.500 kN (165,347 lbf). Thrust (sl): 75,000 kgf. Engine: 750 kg (1,650 lb). Chamber Pressure: 39.46 bar. Area Ratio: 8. Thrust to Weight Ratio: 113.71. Coefficient of Thrust vacuum: 1.7615758510983. Coefficient of Thrust sea level: 1.55883890228938.

Unfuelled mass: 750 kg (1,650 lb).
Diameter: 1.53 m (5.00 ft).
Thrust: 836.30 kN (188,008 lbf).
Specific impulse: 282 s.
Specific impulse sea level: 248 s.
Burn time: 156 s.
Number: 22 .

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Associated Countries
See also
Associated Launch Vehicles
  • Europa European orbital launch vehicle. Europe's first space launcher. The first stage was a British Blue Streak IRBM, the second stage the French Coralie, and the third stage the German Astris. All orbital launch attempts failed due to unreliability of the third stage. The project was cancelled after withdrawal of British support and replaced by the Ariane. More...

Associated Manufacturers and Agencies
Associated Propellants
  • Lox/Kerosene Liquid oxygen was the earliest, cheapest, safest, and eventually the preferred oxidiser for large space launchers. Its main drawback is that it is moderately cryogenic, and therefore not suitable for military uses where storage of the fuelled missile and quick launch are required. In January 1953 Rocketdyne commenced the REAP program to develop a number of improvements to the engines being developed for the Navaho and Atlas missiles. Among these was development of a special grade of kerosene suitable for rocket engines. Prior to that any number of rocket propellants derived from petroleum had been used. Goddard had begun with gasoline, and there were experimental engines powered by kerosene, diesel oil, paint thinner, or jet fuel kerosene JP-4 or JP-5. The wide variance in physical properties among fuels of the same class led to the identification of narrow-range petroleum fractions, embodied in 1954 in the standard US kerosene rocket fuel RP-1, covered by Military Specification MIL-R-25576. In Russia, similar specifications were developed for kerosene under the specifications T-1 and RG-1. The Russians also developed a compound of unknown formulation in the 1980's known as 'Sintin', or synthetic kerosene. More...

Associated Stages
  • Europa-1 Lox/Kerosene propellant rocket stage. Loaded/empty mass 89,406/6,997 kg. Thrust 1,672.67 kN. Vacuum specific impulse 282 seconds. More...

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